/*
 * Copyright (C) 2021 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.sentry;

import io.sentry.util.Objects;

import java.util.concurrent.Callable;

import org.jetbrains.annotations.ApiStatus;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

/**
 * SentryEnvelopeItemHeader
 *
 * @since 2021-06-02
 */
@ApiStatus.Internal
public final class SentryEnvelopeItemHeader {
    private final @Nullable String contentType;
    private final @Nullable String fileName;
    private final @NotNull SentryItemType type;
    private final int length;
    @Nullable
    private final Callable<Integer> getLength;

    SentryEnvelopeItemHeader(
        final @NotNull SentryItemType type,
        int length,
        final @Nullable String contentType,
        final @Nullable String fileName) {
        this.type = Objects.requireNonNull(type, "type is required");
        this.contentType = contentType;
        this.length = length;
        this.fileName = fileName;
        this.getLength = null;
    }

    SentryEnvelopeItemHeader(
        final @NotNull SentryItemType type,
        final @Nullable Callable<Integer> getLength,
        final @Nullable String contentType,
        final @Nullable String fileName) {
        this.type = Objects.requireNonNull(type, "type is required");
        this.contentType = contentType;
        this.length = -1;
        this.fileName = fileName;
        this.getLength = getLength;
    }

    public @NotNull SentryItemType getType() {
        return type;
    }

    /**
     * get length
     *
     * @return length
     */
    public int getLength() {
        if (getLength != null) {
            try {
                return getLength.call();
            } catch (Exception ignored) {
                return -1;
            }
        }
        return length;
    }

    public @Nullable String getContentType() {
        return contentType;
    }

    public @Nullable String getFileName() {
        return fileName;
    }
}
